PRESENT STATUS OF THE SHRIMP TRAWL FISHERY IN THE ...

28 P. A. A. T. Jayawardane et al.
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P. A. A. T. Jayawardane et al
Table 2
Summary of the GLM (general linear model) performed on the catch rates of shrimp trawl
fishery
Source Sums of Degrees of Means F-value Level of R squared
squares of freedom squares significance (P) (r 2 )
Total catch rate
Corrected model 51 5 10.2 38.28 0.000 0.11
Intercept 11625.23 1 11625.23 43629.18 0.000
Site 0.347 1 0.35 1.3 0.25
Season 25.32 2 12.66 47.51 0.000
Site*Season 33 2 16.5 61.92 0.000
Error 424.2 1592 0.27
Total 14211.62 1598
Corrected total 475.2 1597
Total shrimps
Corrected model 398.13 5 79.63 115.41 0.000 0.27
Intercept 5868.91 1 5868.91 8506.84 0.000
Site 38.05 1 38.05 55.16 0.000
Season 328.79 2 164.4 238.29 0.000
Site*Season 148.75 2 74.38 107.81 0.000
Error 1097.64 1591 0.69
Total 9197.01 1597
Corrected total 1495.76 1596
P. indicus
Corrected model 103.96 5 20.79 29.22 0.000 0.09
Intercept 3103.55 1 3103.55 4361.71 0.000
Site 5.15 1 5.15 7.24 0.007
Season 30.49 2 15.24 21.42 0.000
Site*Season 66.31 2 33.15 46.59 0.000
Error 990.47 1392 0.71
Total 4797.25 1398
Corrected total 1094.43 1397
M. dobsoni
Corrected model 387.79 5 77.56 103.91 0.000 0.25
Intercept 4 053.19 1 4053.19 5392.83 0.000
Site 52.43 1 52.43 69.7 6 0.000
Season 316.74 2 158.37 210.72 0.000
Site*Season 137.83 2 68.91 91.69 0.000
Error 1186.76 1579 0.75
Total 7045.32 1585
Corrected total 1574.55 1584